Oil cooler



April 15, 1941. J. E. JENSEN 2,238,170

OIL COOLER Filed July 8, 1940 2 Sheets-Sheet 1 1 FILTER Inventor April 15, 1941- J. E. JIENSEN 2,238,170

' on. COOLER Filed July 8. 1940 2*Shqets-She'et 2 O/L M457.

A iiorney Patented Apr. 15, 1941 1T E D ST OIL COOLER Jens E. Jensen, Waupaca, Wis., assignor of onehalf to Arthur L. Saeck, Waupaca, Wis.

3 Claims.

The present invention relates to new and useful improvements in oil cooling attachments for internal combustion engines, and has for its primary object to provide a container adapted for receiving the oil from the oil filter of the engine and for returning the same to the crankcase of the engine, the receptacle having a cooling coil mounted therein through which the oil passes, the receptacle further being positioned immediately behind the fan of the engine for subjecting the oil to the cooling influence of the air blown rearwardly by the fan.

A further object is to provide a cooling attachment of this character of simple and practical construction, which is eflicient and reliable in performance, relatively inexpensive to manufacture and install in operative position, and otherwise well adapted for the purposes for which the same is intended.

Other objects and advantages reside in the details of construction as more fully hereinafter described and claimed, reference being had to the accompanying drawings forming part hereof, wherein like numerals refer to like parts throughout, and in which Figure l is a side elevational view showing the oil filter and cooling attachment mounted in position relative to the engine,

Figure 2 is a horizontal sectional view through the cooling attachment, taken on a line 2--2 of Figure 1,

Figure 3 is a vertical longitudinal sectional view thereof taken on line 33 of Figure 2, and

Figure 4 is a vertical transverse sectional view taken on a line 44 of Figure 3.

Referring now to the drawings in detail, the numeral 5 designates an internal combustion engine of conventional construction which includes the crank-case B, the fan I and the oil filter 8 secured to the body partition 9, the filter having an oil pipe 10 leading thereto from the crankcase and also being provided with a return pipe II for the filtered oil.

Interposed in the return pipe II is the cooling attachment designated generally at l2 which comprises a substantially rectangular container l3 having a funnel-shaped forward end 14 positioned immediately behind the fan 1, the front end of the receptacle l3 being open.

Supported within the receptacle l3 in spaced relation from the walls thereof, is the oil receptacle l5, the oil receptacle being secured in spaced relation from the walls of the receptacle [3 by spacing brackets l6.

The oil receptacle i5 is provided therein with a rear vertically extending partition IT and a pair of front vertically extending partitions l8, the partitions defining a rear oil chamber I9, a central water or cooling solution chamber 20, an air circulation chamber 2| and a front oil chamber 22.

The chamber 20 is adapted to receive a quantity of water or anti-freeze solution 23 placed therein by means of a filler neck 24 having a screw cap 25 secured thereto.

The oil return pipe I I from the filter 8 extends into the top of the chamber 22 as shown to advantage in Figure 3 of the drawings, and positioned in the water chamber 20 is a coil 26 having one end extending through the chamber 2| and communicating with the lower portion of the chamber 22. The other end of the coil 26 ex tends into the chamber 19 adjacent its upper portion. A return pipe extension II enters the upper rear wall of the chamber II and terminates adjacent its bottom portion for receiving the oil therefrom and conveying the same to the crank-case 6.

The walls of the chamber 2| are provided with perforations 21 to permit the circulation of air therethrough.

The bottom of the receptacle I3 is provided with an opening 28 providing access to a drain plug 29 in the bottom of the water chamber 20.

From the foregoing it will be apparent that the oil after being filtered enters the front cooling chamber 20 through the return pipe I I, the walls of the chamber being cooled by the blast of air from the fan I. The oil then enters the coil 26 where the oil is further cooled by the liquid contained in the chamber 20 and then passes to the rear chamber It for return to the crankcase by the extension pipe H. The top of the receptacle I3 is open to allow free circulation of air entirely around the oil receptacle IS.

The cooling agent in the chamber 20 transmits the cooling eifect of the air circulating about the tank to the coil 26 and by immersing the coil in the cooling agent the coil is not exposed to the heat which normally radiates from the engine and the coil is further kept free from any accumulation of grease and dirt which might collect on the outside thereof and result in a reduction of its cooling efiiciency.

The perforated chamber 2! permits circulation of air entirely around the chamber 22 so as to initially cool the oil therein and the .air chamber 2| also serves to space the liquid cooling chamber 20 from the oil chamber 22 so that the cooling agentin the chamber 20 is not subjected to the heat from the body of oil in the chamber 22. The air chamber 2| further assists in reducing the temperature of the cooling agent in the chamber '20 by providing a circulation of air along the front wall of the latter in addition to the air that circulates around each of its remaining walls, ex-

cept its rear wall, which separates the rear oil chamber H! from the chamber 20. Direct contact of the chambers I9 and 20 aids in the equalization of the temperature of the liquids therein, resulting in a lowering of the temperature of the oil in chamber l9, since the temperature of the cooling agent in the chamber 20 will be normally lower.

It is believed the details of construction, operation and manner of use of the device will be readily understood from the foregoing without further detailed explanation.

What. I claim is:

1. An oil cooler for internal combustion engines comprising a pipe connected to the crankcase of the engine and through which the oil is forced, a tank having a plurality of chambers therein and including a pair of oil chambers, and a cooling chamberhaving a liquid cooling agent therein, a coil immersed in the cooling chamber connected to both oil chambers, said pipe being connected to one of the oil chambers, a return pipe connecting the other oil chamber to the crankcase, and a partially open casing for receiving and circulating air around said tank.

2. An oil cooler for internal combustion engines comprising a pipe connected to the crankcase of the engine and through which the oil is forced, a tank having a plurality of chambers therein and including a pair of oil chambers, and a cooling chamber having a liquid cooling agent therein, a coil immersed in the cooling chamber connected to both oil chambers, said pipe being connected to one of the oil chambers, a return pipe connecting the other oil chamber to the crankcase, an air circulation chamber between the first-named oil chamber and the cooling chamber, and means for receiving and circulating air around said tank and through said air chamber.

3. An oil cooler for internal combustion engines comprising a pipe connected to the crankcase of the engine and through which the oil is forced, a tank having a plurality of chambers therein and including a pair of oil chambers, and a cooling chamber having a cooling agent therein, a coil in the cooling chamber connected to both oil chambers, said pipe being connected to one of the oil chambers, a return pipe connecting the other oil chamber to the crankcase, an air circulation chamber between the first-named oil chamber and the cooling chamber and having perforated walls and a shell for the tank, said shell being spaced from the tank and having its front and top walls open for receiving air at its front end for circulating around the tank and through the air chamber JENS E. JENSEN. 

